feat: add new functions to infer semi-diurnal and diurnal tides

[tsutterley]

diurnal tides will take into account the resonance in the diurnal band (Wahr 1981)

[codecov]

Codecov Report

Attention: Patch coverage is 4.08163% with 141 lines in your changes missing coverage. Please review.

Project coverage is 71.59%. Comparing base (bd3d702) to head (312bfeb).
Report is 15 commits behind head on main.

Files with missing lines	Patch %	Lines
pyTMD/predict.py	3.42%	140 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #346      +/-   ##
==========================================
- Coverage   71.65%   71.59%   -0.06%     
==========================================
  Files          39       39              
  Lines       11042    10495     -547     
  Branches     1522     1407     -115     
==========================================
- Hits         7912     7514     -398     
+ Misses       2632     2517     -115     
+ Partials      498      464      -34     

Flag	Coverage Δ
unittests	71.59% <4.08%> (-0.06%)	⬇️

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